<template>
	<view class="cart-container" v-if="cart,length">
		<!-- 购物车商品列表的标题区域 -->
		<view class="cart-title">
			<!-- 左侧的图标 -->
			<uni-icons type="shop" size="18"></uni-icons>
			<!-- 描述文本 -->
			<text class="cart-title-text">购物车</text>
		</view>
		<!-- 商品列表区域 -->
		<!-- uni-swipe-action 是最外层包裹性质的容器 -->
		<uni-swipe-action>
		  <block v-for="(goods, i) in cart" :key="i">
		    <!-- uni-swipe-action-item 可以为其子节点提供滑动操作的效果。需要通过 options 属性来指定操作按钮的配置信息 -->
		    <uni-swipe-action-item :options="options" @click="swipeActionClickHandler(goods)">
		      <my-goods :goods="goods" :show-radio="true" :show-num="true" @radio-change="radioChangeHandler" @num-change="numberChangeHandler"></my-goods>
		    </uni-swipe-action-item>
		  </block>
		</uni-swipe-action>
		<!-- 结算区域 -->
		<my-settle></my-settle>
	</view>
	<!-- 空白购物车区域 -->
	<view class="empty-cart" v-else>
		<image src="/static/cart_empty@2x.png" class="empty-img"></image>
		<text class="tip-text">空空如也</text>
	</view>
</template>

<script>
	
	import { mapGetters } from 'vuex'
	import badgeMix from '@/mixins/tabbar-badge.js'
	import { mapState, mapMutations } from 'vuex'
	
	export default {
		mixins: [badgeMix],
		computed: {
			...mapGetters('m_cart', ['total']),
			...mapState('m_cart',['cart']),
		},
		data() {
			return {
				options: [{
					text: '删除',
					style: {
						backgroundColor: '#C00000'
					}
				}]
			};
		},
		onShow() {
			this.setBadge()
		},
		methods: {
			...mapMutations('m_cart',['updateGoodsState', 'updateGoodsCount', 'removeGoodsById']),
			
			radioChangeHandler(e) {
				this.updateGoodsState(e)
			},
			numberChangeHandler(e) {
				this.updateGoodsState(e)
			},
			swipeActionClickHandler(goods) {
				console.log(goods)
			},
			swipeActionClickHandler(goods) {
				this.removeGoodsById(goods.goods_id)
			},
			setBadge() {
				uni.setTabBarBadge({
					index: 2,
					text: this.total + ''
				})
			},
			radioChangeHandler(e) {
				console.log(e)
			},
			numChangeHandler(e) {
				console.log(e)
			}
		}
	}
</script>

<style lang="scss">
	.cart-container {
		padding-bottom: 50px;
	}
	.cart-title {
		height: 40px;
		display: flex;
		align-items: center;
		font-size: 14px;
		padding-left: 5px;
		border-bottom: 1px solid #efefef;
		.cart-title-text {
			margin-left: 10px;
		}
	}
	.empty-cart {
		display: flex;
		flex-direction: column;
		align-items: center;
		padding-top: 150px;
	}
	.empty-img {
		width: 90px;
		height: 90px;
	}
	.tip-text {
		font-size: 12px;
		color: gray;
		margin-top: 15px;
	}
</style>
